Season 1
Episode: 1x01 | Airdate: Aug 20, 1989
When the students of Bayside High learn that famed Casey Kasem will be hosting a dance contest at The Maxx, both Zack and Slater vie to ask Kelly for the chance to dance with her in the contest. However since Zack doesn't know how to dance, he turns to Jessie for help in learning how to dance so he can woo Kelly. However, after their lessons conclude, Zack decides to ask Jessie instead as a way to say thanks for his lessons. Meanwhile, Lisa reluctantly agrees to go with Screech after her date dumps her after she sprains her ankle.
Episode: 1x02 | Airdate: Aug 28, 1989
Zack and his friends have gotten their quarterly report cards and their respective parents have gotten everyone presents for a job well done. However, when Lisa goes overboard with her father's credit card at the mall, she and her friends take some drastic measures to pay Mr. Turtle back for all the money Lisa spent, including getting a job at the Max.
Episode: 1x03 | Airdate: Sep 8, 1989
After helping Zack unhook his ham radio, Screech accidently gets struck by lightning. As a result, Screech can now see into the future, resulting in Zack wanting to use his friend's new ability to his advantage: finding out what questions are going to be on the upcoming test that the school's toughest teacher gives as his midterm.
Episode: 1x04 | Airdate: Sep 9, 1989
Zack enlists the help of Screech in the bugging of Jessie's room when she invites Lisa, Kelly, and some friends over for a slumber party, with the hopes of finding out who Kelly plans on asking to an upcoming dance. When the girls find out what Zack did, they decide to get even.
Episode: 1x05 | Airdate: Sep 16, 1989
Zack gets teamed up with Screech to work on a science project at school. However, he soon discovers that Screech is rather depressed about not having a girlfriend and can't concentrate on getting their project done. As a result, Zack takes some drastic measures in finding Screech a date.
Episode: 1x06 | Airdate: Sep 23, 1989
When Zack learns that Slater's father has the opportunity to get stationed to a base in Hawaii, he begins to plot a way to get Slater to agree to move to Hawaii instead of staying at Bayside.
Episode: 1x07 | Airdate: Sep 30, 1989
Mrs. Simpson accidentally throws her back out in class one day, resulting in Mr. Belding bringing in a substitute English teacher. When the girls in the class see how handsome Mr. Crane is, Zack and the rest of the guys in class start plotting to find a way to get the girls to notice them again.
Episode: 1x08 | Airdate: Oct 7, 1989
When Screech inadvertently creates a zit removal cream in chemistry class, Zack decides to team up with him in order to mass produce it and market it to the students of Bayside High. It appears to work well, until the cream accidentally turns the person's face maroon. After selling some of the cream to Kelly the day before the school votes for homecoming queen, Zack fears that Kelly will never want to talk to him again when the side affects hits.
Episode: 1x09 | Airdate: Oct 14, 1989
It's career week at school and Slater starts to fear that wrestling won't lead him down a successful career path. As a result, he decides to quit the team right before a big meet, where he's scheduled to face the best wrestler at Bayside's rival school. When Zack finds out what Slater did, he frantically tries to find a way to get him back on the team so he can win a bet.
Episode: 1x10 | Airdate: Oct 21, 1989
After Kelly wins a pair of tickets to see George Michael in concert, she realizes she won't be able to go unless she gets an A on her upcoming Science test. Zack decides to stack the deck in his favor to be Kelly's plus one to the concert, so he arranges for Screech to tutor her. However, things don't go as Zack expects when she develops a crush on him and instead invites Screech to the concert instead of him.
Episode: 1x11 | Airdate: Nov 4, 1989
As part of an assignment for economics class, the gang forms a friendship bracelet company, but infighting soon leads to trouble and defection.
Episode: 1x12 | Airdate: Nov 11, 1989
Mr. Belding pairs up Kelly and Zack, Jessie and Slater, and Screech and Lisa in a class assignment where they spend the week as married couples. When things don't go as Zack, Slater, and Screech plans, Mr. Belding changes things up to see how the students adjust to his curveball.
Episode: 1x13 | Airdate: Nov 18, 1989
When Zack overhears Mr. Belding and Mr. Dewey talking about Bayside being awarded a grant that allows the Student Body President to get a free trip to Washington, D.C., he decides to run against Jessie for the job.
Episode: 1x14 | Airdate: Dec 2, 1989
When their teacher Miss Wentworth spends some time in class talking about how subliminal advertising works in the business world, Zack decides to use it to his advantage by getting out trouble with Mr. Belding, and by getting Kelly to ask him out to Bayside's Sweetheart dance. However, when Kelly, Jessie, and Lisa find out what he did, they turn to Miss Wentworth for help in formulating a plan to get back at him.
Episode: 1x15 | Airdate: Dec 9, 1989
It's the first day of school and Zack sets his sights on getting Kelly to notice him so he can ask her on a date. However, Slater is just starting at Bayside High and starts throwing a wrench in Zack's plan when he notices how pretty Kelly is.
Episode: 1x16 | Airdate: Dec 16, 1989
It's the Homecoming game against Valley and the two schools play their annual round of pranks. Valley steals Screech, the Bayside mascot, who escapes in time for the game.
Season 2
Episode: 2x01 | Airdate: Sep 8, 1990
The prom is coming up and Kelly is looking toward for a great night until her dad loses his job. Kelly is devastated so she decides not to go.
Episode: 2x02 | Airdate: Sep 15, 1990
To avoid having to go to detention, Mr. Belding gives Zack the option of joining Bayside's branch of the California Cadet Corps, ROTC type program. He then gets tasks recruit his classmates to participate in a friendly athletic competition. However, when he picks the most athletic students to be on his team, while the placing the academic students on the opposing team, to ensure his victory. However, when drill instructor realizes what Zack's up to, he makes him switch teams.
Episode: 2x03 | Airdate: Sep 22, 1990
The gang unearths Bayside's old school radio station and begins broadcasting again, before learning that The Max is to be closed if Max does not manage to pay $10,000 in back rent.
Episode: 2x04 | Airdate: Sep 29, 1990
After becoming jealous of Slater's success in Driver's Ed class, Zack plots to get him into trouble, but his plan soon backfires.
Episode: 2x05 | Airdate: Oct 6, 1990
Zack stays over at Screech's place for the weekend where the two of them along with Slater throw a party which is interrupted by the girls before breaking off a valuable item from Mrs. Powers.
Episode: 2x06 | Airdate: Oct 13, 1990
If Zack gets one more detention, he is suspended. Belding threatens to suspend Zack unless he agrees to go on a date with his niece Penny.
Episode: 2x07 | Airdate: Oct 20, 1990
The gang decides to hold a carnival to raise money for a ski trip. Zack has been failing so Belding calls a meeting for Zack and his dad. Zack hires an actor so that Belding won't be able to call on his dad again.
Episode: 2x08 | Airdate: Oct 27, 1990
Bayside's winner of the Miss Bayside beauty pageant will go on to compete in the state-wide pageant of Miss High School California. The pageant stirs up controversy about sexism, in which both A.C. Slater and Screech enter as contestants to win a bet over who could win. Who will be the next Miss Bayside?
Episode: 2x09 | Airdate: Nov 3, 1990
Jessie turns to caffeine pills to keep up with her studies and her new singing group, Hot Sundae.
Episode: 2x10 | Airdate: Nov 10, 1990
After a heated debate about the school calenders, a photographer decides to use Jessie, Lisa and Kelly in a photo shoot where Kelly is chosen as the winner of a contest that'll make her famous in France.
Episode: 2x11 | Airdate: Nov 17, 1990
In an attempt to make money, Zack sets up a 900 number hotline, with Lisa offering advice to the students of Bayside. However, things go awry when Zack decides to keep the line running by dishing out bad advice.
Episode: 2x12 | Airdate: Nov 23, 1990
After Zack breaks the school's video camera while filming a movie, he talks his friends into sending a picture of Screech dressed as an alien to a tabloid. As a result, they have to trick a government agent passing himself off as tabloid reporter to believe Screech is really an alien.
Episode: 2x13 | Airdate: Nov 24, 1990
If Zack wants to run the track meet, he better prepare his ancestry report where he gets help from an Indian.
Episode: 2x14 | Airdate: Dec 1, 1990
Following a mix up, Kelly has to bring her baby brother Billy to school, and the gang must look after him.
Episode: 2x15 | Airdate: Dec 9, 1990
Mr. Belding's brother Rod, a substitute teacher, arrives at Bayside to teach the gang's History class. Rod proves instantly popular, and soon Mr. Belding is dismayed to find that the kids prefer his brother to him.
Episode: 2x16 | Airdate: Dec 15, 1990
Zack and Kelly's relationship is going from strength to strength, but is soon jeopardized when Zack falls for the new school nurse.
Episode: 2x17 | Airdate: Dec 16, 1990
A.C. Slater and Jessie are finally a couple, but messes it up by disagreeing about how they will celebrate their coupledom, football versus ballet. Zach makes all the wrong moves by getting jealous of Kelly going out with an ex-boyfriend. After a fight breaks out at school, Mr. Belding tries to set the example of how couples should communicate, and after failing miserably, sides with the boys. Neither the guys or the girls want to be the first to apologize, but are miserable without their counterparts. Can Slater and Zach make up for their shortcomings to their girls before it's too late?
Episode: 2x18 | Airdate: Dec 23, 1990
When Zack learns that Bayside High's Glee Club has a chance to go to Hawaii to compete in a national competition, he talks his friends into joining so they all can go and have fun in paradise.
Season 3
Episode: 3x01 | Airdate: Sep 14, 1991
Kelly gets a job as a waitress at The Max and finds herself falling for the new manager, Jeff.
Episode: 3x02 | Airdate: Sep 14, 1991
Due to Lisa's parents pulling some strings, the gang land summer jobs at Malibu Sands beach club, but Zack soon clashes with the owner Leon Carosi, and his initially abrasive daughter, Stacey.
Episode: 3x03 | Airdate: Sep 21, 1991
The gang is forced to choose between supporting Kelly's relationship with Jeff and helping Zack cope with his grief over their break up, while Lisa plans her sweet sixteen party.
Episode: 3x04 | Airdate: Sep 21, 1991
After discovering that the vintage Mustang he wants to buy belongs to Mr. Carosi, Zack convinces him to lower the price by claiming that the gang can win the annual beach volleyball match, though their chances of victory seem slim at best.
Episode: 3x05 | Airdate: Sep 28, 1991
After Mr. Belding accidentally bumps into Zack before a big basketball game and injures his knee, he gets rushed to the hospital and gets told by Lisa's mother that he has to have surgery to repair the damage. As a result, Zack gets scared and tries to sneak out before going under the knife.
Episode: 3x06 | Airdate: Sep 28, 1991
Malibu Sands is preparing to hold the annual Miss Liberty beauty pageant, and Zack, one of the judges, is pressured by Mr. Carosi to rig the competition in Stacey's favor.
Episode: 3x07 | Airdate: Oct 5, 1991
After Screech makes it to the all city chess finals, Zack and Slater make a bet with Valley that he will win, which soon leads to trouble.
Episode: 3x08 | Airdate: Oct 5, 1991
As the gang's summer is starting to wind down at the Beach Club, Zack and Stacey's relationship hits a rough patch when her boyfriend from Boston shows up, looking to formally give her his fraternity pin. Things come to a head when they compete at the annual Malibu Sands ATV race to see who the better man is. Also during the race, Jessie wants to prove to Slater that she can do things just as easy as he can and decides to race against him.
Episode: 3x09 | Airdate: Oct 19, 1991
When a college girl named Danielle comes into the Max, looking to use a phone, Zack soon hits it off with her by lying about his age. He then convinces Screech to make some fake ID's for for him, Slater, and Screech so they can get into a club to hit it off with his new girl and her friends. However, while at the club, he learns some surprising news about Kelly's new boyfriend.
Episode: 3x10 | Airdate: Oct 19, 1991
While Mr. Carosi is away for the day, Stacey is left in charge. She then turns to Zack and the others for help in trying to find a way to hold two parties at the same time that her father accidentally booked for the same night.
Episode: 3x11 | Airdate: Oct 26, 1991
The gang are overjoyed and dream of being rich when oil is found in the football field at Bayside. However, they soon realize that everything has a price.
Episode: 3x12 | Airdate: Oct 26, 1991
It's the last weekend at the beach club and before Stacey heads back east for school, she and her father get in a fight over her relationship with Zack. As a result, Zack works his magic to get Mr. Carosi and Stacey to patch things up. Meanwhile Slater and Kelly have a pair of secret admirers and they soon discover who they are at the farewell luau.
Episode: 3x13 | Airdate: Nov 2, 1991
Jessie's new stepbrother moves in from New York where he has tricks of his own, including bribing her friends.
Episode: 3x14 | Airdate: Nov 2, 1991
After Lisa and Eric crashes Mr. Belding's car, Zack and the boys must find a way to repair the car before Belding returns; meanwhile Jessie still disapproves of Eric hanging out with Lisa.
Episode: 3x15 | Airdate: Nov 9, 1991
In an attempt to raise money for new cheerleading uniforms, Bayside holds a date auction. Zack's plan to go with a girl he finds attractive is ruined when Wendy, an overweight girl, wins him, and he tries desperately to get out of the date.
Episode: 3x16 | Airdate: Nov 9, 1991
Zack's plan to purchase a large amount of tickets to an upcoming U2 doesn't go as planned, and as a result, the gang has to spend the night at the mall. While there, they find a large amount of money, that they eventually come to believe belongs to a pair of criminals who will do anything to get their money back.
Episode: 3x17 | Airdate: Nov 16, 1991
When Zack and his friends spend a Saturday taking their S.A.T. test, Jessie freaks out when she find out that all of her friends scored better than she did.
Episode: 3x18 | Airdate: Nov 16, 1991
The gang travel to Palm Desert for Jessie's father's wedding. His job as manager of a luxury hotel there guarantees them wonderful accommodation, but Jessie takes an immediate dislike to her father's much younger bride.
Episode: 3x19 | Airdate: Nov 23, 1991
As the wedding approaches, Jessie desperately tries to sabotage things, Zack and Kelly grow closer, Screech's quest for a date continues, and Slater attempts to impress Christina and her father.
Episode: 3x20 | Airdate: Nov 23, 1991
When Kristy, a new student, is not allowed to join the wrestling team because of her gender, Zack and Jessie campaign for her to be given a chance. However, Jessie soon mistakenly becomes convinced that Kristy is interested in Slater.
Episode: 3x21 | Airdate: Nov 30, 1991
A famous film star comes to Bayside to shoot an anti-drug public service announcement. The gang are enchanted by him, but when they go to a party at his house, they discover he is a hypocrite.
Episode: 3x22 | Airdate: Nov 30, 1991
While waiting for his band practice to start, Zack has a dream where he, Slater, Screech, Lisa, and Kelly become big stars, only to have everything fall apart when the fame goes to his head.
Episode: 3x23 | Airdate: Dec 7, 1991
It is Cut Day at Bayside, a day on which students traditionally skip class. Zack wants to join in, but because one more absence will mean suspension for him, Mr. Belding is determined to keep an eye on him the entire day.
Episode: 3x24 | Airdate: Dec 7, 1991
Zack, Slater, Screech, Kelly, and Jessie are working at the mall for the holidays, where they befriend a homeless man and his daughter.
Episode: 3x25 | Airdate: Dec 14, 1991
While Zack's Mom prepares to put on the mall's production of A Christmas Carol, the gang try to help the Bentons get back on their feet for the holidays after Laura is accused of stealing.
Episode: 3x26 | Airdate: Dec 21, 1991
As part of Lisa's prize for winning a radio contest, the gang travel to a secluded mansion for a murder mystery weekend. However, things soon become sinister when it appears a real killer is on the loose.
Season 4
Episode: 4x01 | Airdate: Sep 12, 1992
The gang begin their senior year, but rather than it being a positive time, things turn sour when Zack and Slater clash over the new girl at school.
Episode: 4x02 | Airdate: Sep 12, 1992
When the gang take part in a student-teacher exchange program, Zack becomes principal, Kelly a History teacher and Screech and Lisa the gym teachers. However, when Zack, Screech and Kelly clash over an exam, friendships are tested.
Episode: 4x03 | Airdate: Sep 19, 1992
The gang produce a television show for Communications class, with the sauce Screech makes during the cookery segment proving a hit. They decide to market it, and Screech gains a girlfriend, but he refuses to believe she is using him.
Episode: 4x04 | Airdate: Sep 19, 1992
A new girl, Tori, arrives at Bayside and after she takes his parking space, Zack immediately squares off against her. However, she soon develops a seemingly unrequited crush on him.
Episode: 4x05 | Airdate: Sep 26, 1992
When Lisa receives word that a recruiter from FIT wants to interview her, the gang help her put on a fashion show at The Max. However, the close working conditions mean Zack and Lisa grow close, leaving Screech brokenhearted and bitter.
Episode: 4x06 | Airdate: Sep 26, 1992
The gang creates a teen line a teen line, designed to help students with their problems. Zach takes a call from a girl named Melissa and asks her out, but is taken aback when they meet up and he discovers that she is in a wheelchair.
Episode: 4x07 | Airdate: Oct 3, 1992
As the annual masquerade ball approaches, Zack and Slater make a bet about who can kiss Tori first. However, when she discovers their scheme, she decides to get revenge, while Screech's love letters to Lisa cause all manner of mix ups.
Episode: 4x08 | Airdate: Oct 3, 1992
After getting caught using his cellular phone on campus one too many times, Mr. Belding gives Zack detention. He then devises a plan to sneak out and make it to the Max in order to win a trip to Hawaii.
Episode: 4x09 | Airdate: Oct 10, 1992
Slater is offered a wrestling scholarship at the University of Iowa, but finds it difficult to tell his father, who wants him to go to West Point.
Episode: 4x10 | Airdate: Oct 10, 1992
The gang learn about the dangers of drinking and driving when, after getting drunk at a party, they get into an accident in Lisa's mother's car and try to cover it up.
Episode: 4x11 | Airdate: Oct 17, 1992
Slater is horrified when his girlfriend from Germany arrives at Bayside as a new student. Zack helps hide the relationship from Jessie, but it is only a matter of time before she finds out, and Slater must figure out where his heart lies.
Episode: 4x12 | Airdate: Oct 17, 1992
Zack draws the ire of the senior class when the great deal he got on their class rings is too good to be true and turns everybody's fingers green. Zack then turns to Screech for help in getting revenge on his ring dealer.
Episode: 4x13 | Airdate: Oct 24, 1992
It's Valentine's Day and Zack and his friends spend the day reminiscing about past loves and they romantic dates they've been on.
Episode: 4x14 | Airdate: Oct 24, 1992
The girls and the guys have a battle of wills over how to spend money left to the school by an alumnus.
Episode: 4x15 | Airdate: Oct 31, 1992
Zack and the gang are all for the teachers' strike---until they learn it would cancel an academic championship.
Episode: 4x16 | Airdate: Oct 31, 1992
Slater just can't see his sister dating Zack.
Episode: 4x17 | Airdate: Nov 7, 1992
It's time for the senior prom, but problems loom: where will they get the money, and who will go with whom?
Episode: 4x18 | Airdate: Nov 7, 1992
Zack tapes events for a video yearbook, then sells a controversial video-dating tape made from his interviews with Bayside girls.
Episode: 4x19 | Airdate: Nov 14, 1992
The gang throws a postbirthday party for Screech
Episode: 4x20 | Airdate: Nov 14, 1992
A rap staging of "Snow White and the Seven Dorks," with Jessie as Snow White, Zack as the Prince and Lisa as the Talking Mirror.
Episode: 4x21 | Airdate: Nov 21, 1992
Mrs. Belding goes into labor after an earthquake traps her in an elevator with Zack and Tori.
Episode: 4x22 | Airdate: Nov 21, 1992
It's the first day of class at Bayside High and Zack decides to play sick. When Mr. Belding sends the rest of the gang to see what he's up to at home, they start reminiscing about their summer working at the Malibu Sands Beach Club, and going to Palm Springs for the wedding of Jessie's dad.
Episode: S04 Special | Airdate: Nov 27, 1992
Episode: 4x23 | Airdate: Nov 28, 1992
Slater unwittingly dooms his chameleon when he leaves it with Screech (Dustin Diamond), who in turn gives it to Zack.
Episode: 4x24 | Airdate: Nov 28, 1992
Zack enters the school-song contest, but hits a sour note when he sabotages others' entries. Zack: Mark-Paul Gosselaar.
Episode: 4x25 | Airdate: Dec 5, 1992
A retrospective set in the future has Belding showing a tape of the 1993 class to six students---who greatly resemble the old gang. Belding: Dennis Haskins. Zack: Mark-Paul Gosselaar. Lisa: Lark Voorhies.
Episode: 4x26 | Airdate: May 22, 1993
Graduation finds Zack one credit short, and Jessie longing to be valedictorian. Zack: Mark-Paul Gosselaar. Jessie: Elizabeth Berkley. Mr. Belding: Dennis Haskins. Lisa: Lark Voorhies. Screech: Dustin Diamond.
Episode: S04 Special | Airdate: Oct 7, 1994